I look young for my age. Being short is a big part of that. Also subtly whitened teeth, light Botox, shiny flippy hair, shortish, dark coloured manicured nails, keeping makeup light and wearing casual clothes.
If money was no object I would also have
Good hair extensions - for body and volume not length, too many women on tv have obviously fake, long curly blonde extensions that give an aging Barbie affect (se QVC for many examples)
Light lash extensions are great for opening up the eyes and framing the face. Conversly very heavy fake lashes give a dowager/drag queen look.
A breast reduction. Mine are huge (30ff on a very short body) and it is so matronly looking.
Things I would never ever wear because IMO they are aging are
Matching necklace and earring sets, tasteful scarves to liven up an outfit, a very neat Mum bob, brooches, pretty floral dresses. My 20 something colleagues and children can rock all these but on a 50+ woman they give a Queen Mother look.